Malicious PDF — malware analysis report

Static analysis result for SHA-256 b79ea876149f3505…

MALICIOUS

PDF

80.5 KB Created: 2021-03-22 03:47:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f4fb14ddf1c0727eee20ffeee81784d9 SHA-1: d548f8e5ecc51530d872269bad5be3bb730748dd SHA-256: b79ea876149f350502c4ae0b3f0c18a2285f63e8982f27d49320477c827929d0
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating the presence of external URIs and embedded URLs. The 'SE_DOWNLOAD_BUTTON' heuristic suggests a lure to download content. The primary malicious URL, 'https://nipisod.ru/award?keyword=storytelling+with+data+a+data+visualization+guide+pdf', is likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://nipisod.ru/award?keyword=storytelling+with+data+a+data+visualization+guide+pdf PDF link annotation
    • https://cdn.sqhk.co/letarezetap/PibLjcP/clothes_worksheets_clipart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390642/normal_60317938efea9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407303/normal_604018fbc4e86.pdfIn PDF document text
    • https://cdn.sqhk.co/bopelara/jagf2rR/strawberry_cake_recipe_with_fresh_strawberries_and_jello.pdfIn PDF document text
    • https://cdn.sqhk.co/sudizatase/jzfehbZ/2107_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461791/normal_5fcf7d9c08868.pdfIn PDF document text
    • http://legendnat.space/druid_shapeshift_5e_guidele943.pdfIn PDF document text
    • https://cdn.sqhk.co/pimupigedu/dgxsihn/jofukuwekogale.pdfIn PDF document text
    • https://cdn.sqhk.co/gokovolasula/fichjwD/ticker_tape_machine_physics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419225/normal_600e5d3e0f5b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467955/normal_60251af64d483.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/jgVenkW/electrician_apprentice_mobile_al.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445558/normal_602f5801208cf.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/A6Ciaie/78851415104.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501660/normal_5ff9340a19850.pdfIn PDF document text
    • https://cdn.sqhk.co/kigowabalo/ghgjjiX/spinner_io_apk_mod_download.pdfIn PDF document text
    • http://creamwalls.online/dapoxijesufo5773l.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/h8Sii9p/lojafesoxita.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494677/normal_5fd8070d69514.pdfIn PDF document text
    • http://razvivatel.blog/where_to_donate_furniture_in_winnipegci3ho.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b53f931a-d32a-462d-8360-90d4763236a2/how_to_fix_ice_dispenser_on_whirlpool_refrigerator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f0ea11c-171d-497b-b95e-ba0261a3073b/49893031449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c37f10f-c137-4144-bca3-e204ed0769be/chinese_moped_repair_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4decbbb-bc59-4ed3-9eb1-7130cf4474fb/the_male_brain_and_the_female_brain_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72918649-d3e9-4aea-bd86-fada9f5df4f0/how_much_does_permit_test_cost_in_california.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE812 5592 bytes
SHA-256: ff6e41c2c05a55d0422ff890b905e89883727f305137e9c4dac9e50264a147c1
font_01_sfnt_off0000fb2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2A 13392 bytes
SHA-256: 95b8a414fdee5df23d46ebc4ff748cf0cbfb23a74f203d4a6b2b0fcf8842769b
font_02_sfnt_off000125f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F4 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3